21538125

素因数分解:

$3^2\times 5^4\times 7^1\times {\mathrm{547}}^1$

素因数の和:580

約数の個数: 60

約数和(自身を含む): 44510752

約数和(自身を除く): 22972627

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 125, 175, 225, 315, 375, 525, 547, 625, 875, 1125, 1575, 1641, 1875, 2625, 2735, 3829, 4375, 4923, 5625, 7875, 8205, 11487, 13125, 13675, 19145, 24615, 34461, 39375, 41025, 57435, 68375, 95725, 123075, 172305, 205125, 287175, 341875, 478625, 615375, 861525, 1025625, 1435875, 2393125, 3076875, 4307625, 7179375, 21538125]

約数ペア:

[(1, 21538125), (3, 7179375), (5, 4307625), (7, 3076875), (9, 2393125), (15, 1435875), (21, 1025625), (25, 861525), (35, 615375), (45, 478625), (63, 341875), (75, 287175), (105, 205125), (125, 172305), (175, 123075), (225, 95725), (315, 68375), (375, 57435), (525, 41025), (547, 39375), (625, 34461), (875, 24615), (1125, 19145), (1575, 13675), (1641, 13125), (1875, 11487), (2625, 8205), (2735, 7875), (3829, 5625), (4375, 4923)]